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Valorization of Fly Ashes and Sands Wastes from Biomass Boilers in One-Part Geopolymers
Fly ash (FA) and exhausted bed sands (sands wastes) that are generated in biomass burners for energy production are two of the wastes generated in the pulp and paper industry. The worldwide production of FA biomass is estimated at 10 million tons/year and is expected to increase. In this context, th...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9612157/ https://www.ncbi.nlm.nih.gov/pubmed/36296476 http://dx.doi.org/10.3390/molecules27206881 |
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author | Vilarinho, Inês Silveirinha Capela, Marinélia Neto Pinho, Ana Sofia Labrincha, João António Seabra, Maria Paula |
author_facet | Vilarinho, Inês Silveirinha Capela, Marinélia Neto Pinho, Ana Sofia Labrincha, João António Seabra, Maria Paula |
author_sort | Vilarinho, Inês Silveirinha |
collection | PubMed |
description | Fly ash (FA) and exhausted bed sands (sands wastes) that are generated in biomass burners for energy production are two of the wastes generated in the pulp and paper industry. The worldwide production of FA biomass is estimated at 10 million tons/year and is expected to increase. In this context, the present work aims to develop one-part alkali-activated materials with biomass FA (0–100 wt.% of the binder) and sands wastes (100 wt.% of the aggregate). FA from two different boilers, CA and CT, was characterized and the mortar’s properties, in the fresh and hardened conditions, were evaluated. Overall, the incorporation of FA decreases the compressive strength of the specimens. However, values higher than 30 MPa are reached with 50 wt.% of FA incorporation. For CA and CT, the compressive strength of mortars with 28 days of curing was 59.2 MPa (0 wt.%), 56.9 and 57.0 MPa (25 wt.%), 34.9 and 46.8 MPa (50 wt.%), 20.5 and 13.5 MPa (75 wt.%), and 9.2 and 0.2 MPa (100 wt.%), respectively. The other evaluated characteristics (density, water absorption, leached components and freeze–thaw resistance) showed no significant differences, except for the specimen with 100 wt.% of CA. Therefore, this work proved that one-part geopolymeric materials with up to 90 wt.% of pulp and paper industrial residues (FA and sand) can be produced, thus reducing the carbon footprint associated with the construction sector. |
format | Online Article Text |
id | pubmed-9612157 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96121572022-10-28 Valorization of Fly Ashes and Sands Wastes from Biomass Boilers in One-Part Geopolymers Vilarinho, Inês Silveirinha Capela, Marinélia Neto Pinho, Ana Sofia Labrincha, João António Seabra, Maria Paula Molecules Article Fly ash (FA) and exhausted bed sands (sands wastes) that are generated in biomass burners for energy production are two of the wastes generated in the pulp and paper industry. The worldwide production of FA biomass is estimated at 10 million tons/year and is expected to increase. In this context, the present work aims to develop one-part alkali-activated materials with biomass FA (0–100 wt.% of the binder) and sands wastes (100 wt.% of the aggregate). FA from two different boilers, CA and CT, was characterized and the mortar’s properties, in the fresh and hardened conditions, were evaluated. Overall, the incorporation of FA decreases the compressive strength of the specimens. However, values higher than 30 MPa are reached with 50 wt.% of FA incorporation. For CA and CT, the compressive strength of mortars with 28 days of curing was 59.2 MPa (0 wt.%), 56.9 and 57.0 MPa (25 wt.%), 34.9 and 46.8 MPa (50 wt.%), 20.5 and 13.5 MPa (75 wt.%), and 9.2 and 0.2 MPa (100 wt.%), respectively. The other evaluated characteristics (density, water absorption, leached components and freeze–thaw resistance) showed no significant differences, except for the specimen with 100 wt.% of CA. Therefore, this work proved that one-part geopolymeric materials with up to 90 wt.% of pulp and paper industrial residues (FA and sand) can be produced, thus reducing the carbon footprint associated with the construction sector. MDPI 2022-10-14 /pmc/articles/PMC9612157/ /pubmed/36296476 http://dx.doi.org/10.3390/molecules27206881 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Vilarinho, Inês Silveirinha Capela, Marinélia Neto Pinho, Ana Sofia Labrincha, João António Seabra, Maria Paula Valorization of Fly Ashes and Sands Wastes from Biomass Boilers in One-Part Geopolymers |
title | Valorization of Fly Ashes and Sands Wastes from Biomass Boilers in One-Part Geopolymers |
title_full | Valorization of Fly Ashes and Sands Wastes from Biomass Boilers in One-Part Geopolymers |
title_fullStr | Valorization of Fly Ashes and Sands Wastes from Biomass Boilers in One-Part Geopolymers |
title_full_unstemmed | Valorization of Fly Ashes and Sands Wastes from Biomass Boilers in One-Part Geopolymers |
title_short | Valorization of Fly Ashes and Sands Wastes from Biomass Boilers in One-Part Geopolymers |
title_sort | valorization of fly ashes and sands wastes from biomass boilers in one-part geopolymers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9612157/ https://www.ncbi.nlm.nih.gov/pubmed/36296476 http://dx.doi.org/10.3390/molecules27206881 |
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